A study and reorganization of<i>Plagioporus</i>Stafford, 1904 (Digenea: Opecoelidae) and related genera, with special reference to forms from European Atlantic waters

The phylogenetic relationships of representative species of the superfamily Lepocreadioidea were assessed using partial lsrDNA and nad1 sequences. Forty-two members of the family Lepocreadiidae, six putative members of the Enenteridae, six gyliauchenid species and one Gorgocephalidae, were studied along with 22 species representing 8 families. The Lepocreadioidea is found to be monophyletic, except for the two species of the putative enenterid genus Cadenatella, which are found to be only distantly related to the lepocreadioids. The Lepocreadioidea is formed of five clades in a polytomy, the Gorgocephalidae, a clade containing the Enenteridae and Gyliauchenidae, a small clade of atypical lepocreadiines and the deep-sea lepidapedine lepocreadiids, a small clade consisting of a freshwater form and a group of shallow-water putative lepidapedines and the final clade includes the remaining lepocreadiids. Thus, the generally accepted concept of the Lepocreadiidae is polyphyletic. The Enenteridae (minus Cadenatella) and the Gyliauchenidae are jointly and individually monophyletic, and are sister groups. The nad1 gene on its own places a deep-sea lepocreadiine with the deep-sea lepidapedines, whereas lsrDNA, combined sequences and morphology place this deep-sea lepocreadiine within a group of typical lepocreadiids. It could not be demonstrated that a significant proportion of sites in the nad1 gene evolved under positive selection; this anomalous relationship therefore remains unexplained. Most deep-sea species are in a monophyletic group, a few of which also occur in shallow waters, retaining some characters of the deep-sea clade. Many lepocreadioid species infect herbivorous fish, and it may be that the recently discovered life-cycle involving a bivalve first intermediate host and metacercariae encysted on vegetation is a common life-cycle pattern. The host relationships show no indication of co-speciation, although the host-spectrums exhibited are not random, with related worms tending to utilize related hosts. There are, however, many exceptions. Morphology is found to be of limited value in indicating higher level relationships. For example, even with the benefit of hindsight the gyliauchenids show little morphological similarity to their sister group, the Enenteridae.

Section: Cadenatellinae Gibson Et Bray 1982mentioning

confidence: 99%

The phylogeny of the Lepocreadioidea (Platyhelminthes, Digenea) inferred from nuclear and mitochondrial genes: Implications for their systematics and evolution

Bray

Waeschenbach

Cribb

et al. 2009

“…Madhavi, 1975) Bray, 1990(syn. Plagioporus cynoglossi Madhavi, 1975: Pleuronectiformes, Northern Indian Ocean ( Madhavi 1975, Bijukumar 1997 (Looss, 1901) Stossich, 1905; Lebouria alacris (Looss, 1901) Nicoll, 1909; Plagioporus alacer (Looss, 1901) Price, 1934: Labrus bergylta, other Labridae; NE Atlantic and Mediterranean Sea (Looss 1901, Nicoll 1910, Dawes 1947 (Nicoll, 1910) Price, 1934: Solea solea, other Pleuronectiformes, Callionymus lyra; North Atlantic (Dujardin 1845;Nicoll 1909Nicoll , 1910Dawes 1947;Gibson and Bray 1982 (79) long, 9.13-12.6 (10.4)% of body-length. just overlaps ventral sucker;2)% of body-length.…”

Section: Discussionmentioning

confidence: 99%

“…The genus was erected by Gibson and Bray (1982) to include those 'species of Plagioporus (sensu lato) which are marine and possess both a ventro-lateral genital pore and an excretory vesicle which reaches forward at least to the level of the anterior testis'. The vitellarium was defined with the 'lateral fields confluent in post-testicular region and normally dorsally in forebody (fields at least approach one another)'.…”

Section: Discussionmentioning

confidence: 99%

Opecoelids (Platyhelminthes, Digenea) from the fork-tailed threadfin bream Nemipterus furcosus (Valenciennes, 1830) (Perciformes, Nemipteridae), with preliminary keys to the problematic genera Macvicaria Gibson et Bray, 1982 and Neolebouria Gibson, 1976

Bray¹,

Justine²

2009

The opecoelid species Macvicaria jagannathi (Gupta et Singh, 1985) Bijukumar, 1997 (new syn. Plagioporus deeghaensis Gupta et Gupta, 1988) and Neolebouria lineatus Aken’Ova et Cribb, 2001 are redescribed from Nemipterus furcosus, from the waters off New Caledonia. Provisional keys to the genera Macvicaria Gibson et Bray, 1982 and Neolebouria Gibson, 1976 are presented. The following new combinations are made: Macvicaria yamagutii (Gupta et Ahmad, 1977), M. puriensis (Gupta et Govind, 1984) and M. chilkai (Gupta et Govind, 1984).

“…M. magellanica is the third representative of the genus Macvicaria Gibson et Bray, 1982 recorded in the Magellanic sub-region. The species was found in P. longipes in Beagle Channel (Laskowski et al 2013).…”

Section: Macvicaria Magellanicamentioning

confidence: 99%

Digenea in notothenioid fish in the Beagle Channel (Magellanic sub-region, sub-Antarctica)

Jeżewski

Zdzitowiecki

Laskowski

2014

Fish of five species of Notothenioidei (104 specimens), Cottoperca trigloides, Patagonotothen brevicauda, P. longipes, P. tessellata and Champsocephalus esox, caught in the Beagle Channel (Magellanic sub-region, sub-Antarctica) were infected with Digenea of nine species (1130 specimens). Faunistic data on the occurrence of all nine parasites are provided. The most abundant digenean species was Macvicaria magellanica found in the intestine of three host species of the genus Patagonotothen. The second most abundant digenean species was Elytrophalloides oatesi found in the stomach of four host species, with exception of P. brevicauda. Three digenean species: Stenakron kerguelense, Whitegonimus ozoufae and Genolinea bowersi, were more abundant in fish caught at the harbor of Ushuaia (depth 7-9 m), remaining six species: M. magellanica, Neolepidapedoides subantarcticus, Postmonorchis variabilis, Derogenes varicus, E. oatesi and Lecithaster macrocotyle, in the eastern mouth of the Beagle Channel (depth 30 m).